Biden Says Vaccine Is Safe for Kids Children 12-15

The video discusses recent efforts to increase vaccination accessibility, including opening federal pharmacy sites and offering free rides through Uber and Lyft. Various incentives are being provided to encourage vaccinations, such as discounts and promotions. The current vaccination progress is highlighted, with a goal to reach 70% of adults vaccinated. A new development is the approval of the Pfizer vaccine for adolescents aged 12 and older, expanding eligibility to 17 million more Americans.

What role did scientists and researchers play in the vaccination efforts mentioned?

How many more Americans are now eligible to get vaccinated due to the new authorization?